1. Department of Traditional Chinese Medicine, The Third Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510630, P.R. China
2. Department of Otorhinolaryngology, The Seventh Affiliated Hospital, Sun Yat‑sen University, Shenzhen, Guangdong 518107, P.R. China
3. Biofeedback Laboratory and 5Department of Biomedical Engineering, Xinhua College of Sun Yat‑sen University, Guangzhou, Guangdong 510520, P.R. China